Section 5.2 Igneous Rocks

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Vocabulary

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Extrusive rock: is igneous rock formed from lava that went into Earth's surface

Intrusive rock: Igneous rock that formed when magma hardened beneath Earth's surface

Porphyritic Texture: a rock with large crystals scattered on a background of much smaller crystals

Outline

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Characteristics of Igneous Rock

• Origin
• Texture
• Mineral Composition

Uses of Igneous Rocks

• building material
• construction
• cleaning and polishing
• perlite